Yeah, sorry I just read the article and found the answer, they tag the videos to train their AI.

Also why is Meta watching that footage?

The pessimistic in me says it’s only a marketing campaign and they won’t change anything.They made the poll be shared by people on both camps and got “We’re great because we let you choose” as a response after answering.

And money, lots of money.

This you can even use YouTube Music with it.

Aaand they got their video taken down, link to post on YT

Here’s a mirror on internet archive.